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Dear Clinic · Answers · Light & Energy
Answered in Cheongdam, Gangnam, Seoul

What Is the Difference Between Ablative and Non-Ablative Laser?

One removes tissue at the point it strikes. The other passes through an intact surface and works underneath it. That single distinction decides how long you are visibly recovering, how many visits a plan takes, and which device on this floor you are booked onto.

Ablative here: CO2 and erbium, per lesion Non-ablative here: toning and Excel V Open 365 days
Ask Which Category Fits You See the Comparison
The short answer

Ablative and non-ablative, separated by the skin surface

An ablative laser vaporises the tissue it lands on, leaving an open wound that has to close before the skin looks normal again. A non-ablative laser passes through an intact surface and deposits its energy on a target underneath, so the outside stays sealed. Depth of effect is not the dividing line. What is removed on the way in is.

The two categories are aimed at different things. Ablative work is local: a lesion is taken down layer by layer, which is why it is charged one lesion at a time. Non-ablative work is distributed across a field, so that a chromophore inside the skin absorbs it selectively — haemoglobin in a vessel, or melanin in a patch of uneven tone.

A third group gets filed under the same question and belongs to neither category. Radiofrequency devices generate heat through electrical resistance inside tissue and use no light at all. Two of them run on this floor.

Category one

Where ablative laser work sits on the Dear Clinic floor

CO2 and erbium are the ablative wavelengths used here, and both are run per lesion instead of across a whole face.

01

What the beam actually does to a lesion

Water inside the tissue absorbs the wavelength and the treated layer is vaporised. The lesion comes down in controlled passes until it sits level with the skin around it, an endpoint judged by eye.

02

Why per-lesion pricing follows the technique

Because the target is a single spot, the work is counted by the spot. Each lesion treated is charged at ₩10,000 (≈ $5), so a short list is inexpensive and a long list is arithmetic you can do before you arrive.

03

The open surface is the trade-off

A small scab forms at each treated point and stays for several days while the surface closes. This is the only route on the floor that breaks the skin deliberately, and it is the reason travel plans get discussed before the appointment is set.

Full-face ablative resurfacing is a different proposition and is not on the price list here. Where a whole field needs work, the plan is built from needle-delivered energy; the acne scar page sets out that sequence.

Category two

The non-ablative light routes running in Cheongdam

Toning

Low-fluence 1064 nm, repeated on purpose

Dual and triple laser toning deliver 1064 nm Nd:YAG at deliberately low energy across the whole field, with in-clinic skincare closing the session. Nothing is removed, which is precisely why it is sold as a repeated course instead of a single heavy treatment. One session is ₩200,000 (≈ $145) on the dual configuration and ₩300,000 (≈ $215) on the triple. The full route is described on the laser toning page.

Excel V

532 and 1064 nm aimed at a chromophore

The Cutera Excel V is a vascular and pigment platform carrying two wavelengths. Light passes through an intact surface and is absorbed by haemoglobin in a vessel or by melanin in a flat brown mark, with the shorter wavelength taking surface targets and the longer one reaching deeper vessels. A session is ₩150,000 (≈ $105) for the laser itself, and the device has its own treatment page.

Hair reduction belongs in this category too. The GentleMax Pro platform delivers 755 nm alexandrite and 1064 nm Nd:YAG with dynamic cooling through an unbroken surface, targeting melanin in the follicle. Rates are published per body area on the hair removal page.

Category three, often miscalled

Two devices here that heat with radiofrequency instead of light

Potenza

Needles carry the energy past the surface

Radiofrequency microneedling drives fine needles through the skin and releases energy from their tips inside the dermis. The surface is punctured mechanically and is not vaporised, so a grid of pinpoint marks appears where the needles landed. A standard-tip visit is ₩250,000 (≈ $180); the Potenza page covers both tip configurations.

Agnes

An insulated shaft protects the layer above

The needle is insulated along its length so radiofrequency is released only at the tip, heating one sebaceous gland while the epidermis above it is spared. A full-face visit is ₩250,000 (≈ $180), and the route is described on the Agnes page.

This matters at the consultation because radiofrequency energy is not absorbed by melanin the way light is. Where higher melanin would force a light-based route to be dialled well down, a needle-delivered plan can reach the same depth without asking the pigment question.

In the clinic

The devices and hands behind this treatment

Cutera excel V vascular laser console with its touchscreen and delivery fibre
A non-ablative platform: light through an intact surface.
Jeisys Potenza RF microneedling system with both handpieces and its touchscreen showing the treatment interface
Radiofrequency delivered through needle tips inside the dermis.
Side by side

Ablative, non-ablative and radiofrequency on one table

 Ablative laserNon-ablative laserRadiofrequency by needle
What reaches the targetLight absorbed by water, removing tissueLight absorbed by haemoglobin or melaninElectrical energy released at the needle tip
The surface afterwardsOpen, then scabbed at each pointIntact throughoutPunctured in a fine grid
How it is sold herePer lesion treatedPer session, or a block of ten for toningPer visit
On this floorCO2 and erbiumToning, Excel V, GentleMax ProPotenza and Agnes
Listed rate₩10,000 (≈ $5)₩150,000 (≈ $105) for Excel V₩250,000 (≈ $180) standard tip

Figures current for September 2026, quoted in KRW with a USD equivalent shown for orientation only. Toning blocks, pumping-tip Potenza and the combined single-day laser plan each carry their own line on the price list. The same published line applies to residents and to visitors.

Which category your face points to

Downtime and skin type decide this more than preference does

Recovery is the first filter. An open surface has to close, so per-lesion ablative work carries a visible scab for several days at each treated point. Non-ablative light leaves the surface sealed: toning settles quickly, while Excel V can darken treated vessels and turn pigment spots into fine crusts. Needle radiofrequency sits between the two.

Skin type is the second filter, and it works differently in each category. Light-based routes are read against melanin: the more pigment a skin carries, the more carefully energy is lowered and intervals lengthened, because heat into melanin-rich skin can leave temporary darkening behind. Published follow-up on repeated low-fluence toning also describes mottled loss of pigment, which is why fluence here stays conservative and a course is reviewed between visits. Radiofrequency is comparatively indifferent to melanin, and much of the peer-reviewed scar work on it was conducted in Asian patient groups.

The third filter is what you want changed. Distinct raised or pigmented lesions favour the ablative route, since the work is local and finishes. Standing redness and visible vessels favour non-ablative light, since the target sits inside a sealed surface. Dents, scars and slack texture favour needle radiofrequency. Where two apply at once, the order is set at diagnosis.

Dear, Knowhow

How the category is chosen here before a device is named

01 — THE FULL ARSENAL

All three categories are in the building

Ablative per-lesion work, two non-ablative light platforms and two radiofrequency needle systems sit on the same floor. The category is therefore an open decision, and the cheapest published line wins whenever the scan supports it.

02 — DIAGNOSIS FIRST

Five light sources read the target first

EVE Muse 3D imaging with AI analysis separates haemoglobin from melanin, and surface pigment from deeper pigment, before the word ablative is used. Knowing what absorbs the energy makes the category obvious; guessing it is how a course gets paid for twice.

03 — DIRECTOR-PERFORMED

Ablative endpoints are judged by eye

Per-lesion work stops when the lesion is level, which is a judgement made pass by pass at the handpiece. Your session is director-performed from the first pass to the last, so the hand deciding the endpoint is the hand that read the scan.

Caution

Aftercare after each energy category at Dear Clinic

After ablative points — keep each scab dry and undisturbed until it releases on its own. Picking one is how a temporary mark becomes a lasting one.
After non-ablative light — expect treated vessels or spots to darken before they clear, and let fine crusts shed without help.
After needle radiofrequency — moisturise generously over the pinpoint grid and leave it alone while the flush settles.
All three — sunscreen every morning, strong sun avoided entirely, and saunas, pools, hard training and strong actives paused for the window your director specifies.
Call the clinic if redness stays angry, blisters appear, or the treated area feels hotter on day three than on day one.
Medical Team

Five doctors, one standard

Director-performed treatment is a Dear promise — your procedure is planned and performed by the doctors below.

Dr. Jemin Kim — Medical Director and Founder, Dear Clinic
Dr. Jemin Kim
Yonsei University College of Medicine
Medical Director · Founder
Dr. Sanghyun Lee — Director, Dear Clinic
Dr. Sanghyun Lee
Seoul National University College of Medicine
Director
Board-certified · Family Medicine
Dr. Seonhaeng Lee — Director of Aesthetic Medicine, Dear Clinic
Dr. Seonhaeng Lee
Chosun University College of Medicine · Residency, Samsung Medical Center
Director, Aesthetic Medicine
Dr. Daeun Jung — Director, Dear Clinic
Dr. Daeun Jung
Ajou University College of Medicine
Director
Board-certified · Family Medicine
Dr. Woojae Jung — Director of Aesthetic Medicine, Dear Clinic
Dr. Woojae Jung
Seoul National University — B.S. in Medicine
Director, Aesthetic Medicine
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FAQ

Related questions about ablative and non-ablative energy

Is a fractional laser ablative or non-ablative?
Fractional describes the pattern, not the category. A fractional device treats columns of skin and leaves untouched tissue between them, and that pattern exists in both. What to ask about any device is whether the columns it makes are vaporised or simply heated, because that sets your recovery.
Which category is stronger for acne scars?
Neither wins on category alone. Published split-face work has compared fractional carbon dioxide against needle-delivered radiofrequency for acne scars in a single treatment, and the scar type decides more than the technology does. Tethered scars are usually released with a needle first, which is why scar plans here run as a sequence.
Does non-ablative mean there is no downtime at all?
No. It means the surface stays sealed, which is a different claim. Excel V frequently darkens treated vessels and turns pigment spots into fine crusts for several days, and needle routes leave a visible grid. Toning is the gentlest of the three to recover from, and even that leaves warmth and a flush on the day.
Do you offer full-face ablative resurfacing?
CO2 and erbium here are run per lesion and charged at ₩10,000 (≈ $5) for each one treated. Full-face ablative resurfacing is not on the price list. Where a whole field needs work, the plan is normally built from needle-delivered radiofrequency and, where scarring is tethered, from a release step beneath it.
Which category suits deeper skin tones better?
Energy absorbed by melanin needs more caution as pigment rises, so light-based routes run at lower settings with longer intervals in deeper tones. Radiofrequency does not read melanin the same way, and much of the published scar work on it was carried out in Asian patient groups. Your own settings come from the scan.
Can an ablative and a non-ablative treatment be done together?
Sometimes, where the fields are separate. A few discrete lesions treated per lesion can sit alongside a light-based session covering different skin on the same visit. Stacking both on the same inflamed field is avoided, because heat compounds and so does the recovery that follows it.
Is radiofrequency microneedling a laser?
It is not. There is no light involved: energy is generated by electrical resistance inside tissue and released from needle tips in the dermis. The word laser gets attached to it in marketing often enough that we correct it at consultation, because the aftercare and the pigment risks are genuinely different.
How many sessions does each category take?
Per-lesion ablative work often finishes in one visit for the lesions treated. Non-ablative light and needle routes answer to repetition, because collagen and pigment turn over across weeks. A likely range is given at the scan review and revised as your skin responds.
Which category is used for redness and visible vessels?
Non-ablative light, every time. Haemoglobin inside an intact vessel is the target, so the surface has no reason to be removed to reach it. Excel V carries both a shorter and a longer wavelength for exactly this, with the choice made lesion by lesion at the scan review.
Will an ablative treatment leave a scar?
The treated point heals as a small scab and then as new surface, and how it finishes depends on skin type, aftercare and whether the scab was disturbed. Temporary lightening or darkening of the spot is the more common outcome to plan for, and picking a scab early is the most avoidable cause of a lasting mark.
Does either category cost more for visitors from abroad?
No. The same published line applies to everyone, settled in KRW, with the USD figure alongside it shown as a reference that moves with the exchange rate. The receipt names the line you were actually treated on.
How do I find out which category my skin needs?
Send the consultation form with the areas that concern you and close-range photographs in side light, since raised lesions and texture show in raking light and vanish in a flat selfie. We reply in English as soon as possible, and the EVE Muse scan settles it properly on the day you come in.
Consultation

Ask which energy your skin should be given

Your questions, answered in English as soon as possible.

Scientific Evidence

Peer-reviewed work across both energy categories

The comparison on this page rests on published studies from each category. Ablative fractional carbon dioxide has been tested head to head against needle-delivered radiofrequency for acne scars in a split-face randomised design. Non-ablative low-fluence 1064 nm has been followed over the long term and examined for mottled loss of pigment after repeated exposure. Vascular wavelengths have been compared against each other for facial telangiectasia, and needle-delivered radiofrequency has been assessed for atrophic scars in Asian patients.

Each reference below carries a resolvable DOI from an indexed journal. They inform how the category and the settings are chosen here; what your own skin needs is decided after your scan.

  1. Hendel K et al. Fractional CO2‐laser versus microneedle radiofrequency for acne scars: A randomized, single treatment, split‐face trial. Lasers in Surgery and Medicine. 2023. doi:10.1002/lsm.23655
  2. Vejjabhinanta V et al. The efficacy in treatment of facial atrophic acne scars in Asians with a fractional radiofrequency microneedle system. Journal of the European Academy of Dermatology and Venereology. 2013. doi:10.1111/jdv.12267
  3. Jang YH et al. Changes in Melanin and Melanocytes in Mottled Hypopigmentation after Low-Fluence 1,064-nm Q-Switched Nd:YAG Laser Treatment for Melasma. Annals of Dermatology. 2015. doi:10.5021/ad.2015.27.3.340
  4. Gokalp H et al. Long‐term results in low‐fluence 1064‐nm Q‐Switched Nd:YAG laser for melasma: Is it effective? Journal of Cosmetic Dermatology. 2016. doi:10.1111/jocd.12253
  5. Uebelhoer NS et al. A Split-Face Comparison Study of Pulsed 532-nm KTP Laser and 595-nm Pulsed Dye Laser in the Treatment of Facial Telangiectasias and Diffuse Telangiectatic Facial Erythema. Dermatologic Surgery. 2007. doi:10.1111/j.1524-4725.2007.33091.x

References are provided for information — outcomes vary by individual and are assessed at your diagnosis.

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